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Philip Ward

2009-Aug-31 11:50 UTC

[Nut-upsdev] SNMP on HP UPS

Hi,

I would like to contribute code to make the SNMP driver compatible with
HP's AF401A UPS module. It is also compatible with HP's older SNMP
modules.
It's just a new mib specification plus the necessary changes to
snmp-ups.c

Several sources have told me that these UPSs use the cpqpower.mib, but
comparing that mib at http://www.snmplink.org/cgi-bin/nd/m/Ent/H/Hewlett
%20Packard%20(HP)/%5BALL%5D%20-%20HP%20Insight%
20Management/Compaq/cpqpower.mib with the output of an snmpwalk shows
this not to be the case.
Therefore I have created af401amib.h which is just a modified copy of
ietfmib.h.

Here are the differences between ietfmib and af401amib

ups.test.result ("1.3.6.1.2.1.33.1.7.4") not supported.
battery.current ("1.3.6.1.2.1.33.1.2.6.0") not supported.
battery.temperature ("1.3.6.1.2.1.33.1.2.7.0") not supported.
output voltage is "1.3.6.1.2.1.33.1.4.4.1.2.1"
output current is "1.3.6.1.2.1.33.1.4.4.1.3.1"    

The following output levels are not supported:
    output.realpower
    output.L1-N.voltage
    output.L2-N.voltage
    output.L3-N.voltage
    output.L1.current
    output.L2.current
    output.L3.current
    output.L1.realpower
    output.L2.realpower
    output.L3.realpower
    output.L1.power.percent
    output.L2.power.percent
    output.L3.power.percent

input.frequency is "1.3.6.1.2.1.33.1.3.3.1.2.1"    
input.voltage is "1.3.6.1.2.1.33.1.3.3.1.3.1"    
input.current is "1.3.6.1.2.1.33.1.3.3.1.4.1"    

The following input levels are not supported:
    input.L1-N.voltage
    input.L2-N.voltage
    input.L3-N.voltage
    input.L1.current
    input.L2.current
    input.L3.current
    input.L1.realpower
    input.L2.realpower
    input.L3.realpower

Since the SNMP driver complains and exits if it tries to access a value
that is not supported it was necessary to completely remove upsupported
items from the specification.

I hope this code is accepted as it would mean I no longer have to build
my own nut package when a new debian version comes out.

Thanks,


-  
Philip Ward
Unix Systems Administrator
Ext 7274


-- 
Academic Excellence at the Heart of Scotland.
The University of Stirling is a charity registered in Scotland, 
 number SC 011159.

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Charles Lepple

2009-Aug-31 13:22 UTC

head link

[Nut-upsdev] SNMP on HP UPS

On Aug 31, 2009, at 7:50 AM, Philip Ward wrote:
> Hi,
>
> I would like to contribute code to make the SNMP driver compatible  
> with
> HP's AF401A UPS module. It is also compatible with HP's older SNMP
> modules.
> It's just a new mib specification plus the necessary changes to
> snmp-ups.c
Philip,

thanks for the patch. Which version is the patch against?

The maintainer of snmp-ups (Arnaud) is on vacation at the moment, but  
if you have an account on Alioth, you can create a patch tracker item  
and get notified automatically when things get merged. If you don't  
want to bother with setting up an account, you can still keep tabs on  
it via this email list.

https://alioth.debian.org/tracker/?atid=411544&group_id=30602&func=browse

- Charles

Arjen de Korte

2009-Aug-31 13:30 UTC

head link

[Nut-upsdev] SNMP on HP UPS

Citeren Philip Ward <p.g.ward op stir.ac.uk>:

[...]
> Therefore I have created af401amib.h which is just a modified copy of
> ietfmib.h.
In that case, I very much doubt that it is needed to add another MIB  
to snmp-ups. Unsupported OIDs are meant to be ignored. Unless they  
happen to be the one that is used to check if the MIB is supported of  
course, this shouldn't cause the driver to exit at any time.
> Here are the differences between ietfmib and af401amib
[...]
> Since the SNMP driver complains and exits if it tries to access a value
> that is not supported it was necessary to completely remove upsupported
> items from the specification.
The SNMP driver *will* complain about unsupported OIDs (unfortunately,  
telling you that it is an error), but should proceed anyhow.

Could you post the output of

     /path/to/snmp-ups -DDD -a upsname

for the original (unmodified) snmp-ups driver?

Best regards, Arjen
-- 
Please keep list traffic on the list

Arjen de Korte

2009-Aug-31 14:42 UTC

head link

[Nut-upsdev] SNMP on HP UPS

Please keep list traffic on the list.

----- Doorgestuurd bericht van p.g.ward op stir.ac.uk -----
     Datum: Mon, 31 Aug 2009 14:59:37 +0100
       Van: Philip Ward <p.g.ward op stir.ac.uk>
  Onderwerp: Re: [Nut-upsdev] SNMP on HP UPS
       Aan: Arjen de Korte <nut+devel op de-korte.org>

Sure,

The output is attached.

However, it is not just unsupported OIDs that are a problem, but also
different OIDs.

output voltage is "1.3.6.1.2.1.33.1.4.4.1.2.1" on the af401a but ietf
has it at "1.3.6.1.2.1.33.1.4.4.1.2.0"
output current is "1.3.6.1.2.1.33.1.4.4.1.3.1" on the af401a but ietf
has it at "1.3.6.1.2.1.33.1.4.4.1.3.0"

Similarly for input.frequency, input.voltage and input.current. I'm not
sure that there is a way around these differences without either a new
mib, or changing the way that the driver scans the OID tree to try and
resolve them.

Thanks for taking the time to consider this.

-
Philip Ward
Unix Systems Administrator
Ext 7274


On Mon, 2009-08-31 at 14:30 +0100, Arjen de Korte wrote:> Citeren Philip Ward <p.g.ward op stir.ac.uk>:
>
> [...]
>
> > Therefore I have created af401amib.h which is just a modified copy of
> > ietfmib.h.
>
> In that case, I very much doubt that it is needed to add another MIB
> to snmp-ups. Unsupported OIDs are meant to be ignored. Unless they
> happen to be the one that is used to check if the MIB is supported of
> course, this shouldn't cause the driver to exit at any time.
>
> > Here are the differences between ietfmib and af401amib
>
> [...]
>
> > Since the SNMP driver complains and exits if it tries to access a
value
> > that is not supported it was necessary to completely remove
upsupported
> > items from the specification.
>
> The SNMP driver *will* complain about unsupported OIDs (unfortunately,
> telling you that it is an error), but should proceed anyhow.
>
> Could you post the output of
>
>      /path/to/snmp-ups -DDD -a upsname
>
> for the original (unmodified) snmp-ups driver?
>
> Best regards, Arjen
> --
> Please keep list traffic on the list
>
>
> _______________________________________________
> Nut-upsdev mailing list
> Nut-upsdev op lists.alioth.debian.org
> http://lists.alioth.debian.org/mailman/listinfo/nut-upsdev
--
Academic Excellence at the Heart of Scotland.
The University of Stirling is a charity registered in Scotland,
  number SC 011159.



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